Condensation drain



Aug- 14, 1945. w. QUEIROLO 2,382,579

CONDENSATION DRAIN 1 Filed Feb. 5, 1944 TIE-1 BY 0 Patented Aug. 14,1945 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to a condensation drain, particularly oneintended to be used in a stack carrying wet gases from a fuel burner.

In the operation of a fuel burner, water is necessarily present in theproducts of combustion, due to the oxidation of hydrogen present in thefuel to form water. Particularly in those instances where the burnergases are conducted through relatively light pipes having little heatretaining capacity, so the atmosphere can quickly cool gases in thepipe, water condenses and collects. Instances are known where the waterhas actually filled an elbow, cutting oil gas flow through the pipe.Other instances are known where the collected water has drained back andhas put out the fire.

It is in general the broad object of the present 7 invention to providea simple condensation drain In the drawing accompanying and forming apart hereof, Figure l is a side elevation partly in section illustratinga condensate drain of this invention employed between adjacent pipesections.

Figure 2 is a plan view of the condensate drain of this invention.

Referring to the drawing, I have shown adjacent pipe sections 5 and 6.These can comprise any of the usual sheet-metal or composition pipesusually employed to carry wet gases. These pipes are ordinarily f thesame internal and external diameter and: are usually connected togetherby some form of coupling, or by brazing.

In accordance with this invention I provide a condensate drain in theform a frustum of a cone, as indicated generally by numeral 1 in thedrawing. This structure is usually made of sheet metal and is largeradjacent itsbase 8 than at the top portion 9, so that the top portionfitswithin pipe 5 while the bottom portion 8 slips over the top of pipe6. To permit condensate collecting in pipe 5 to collect and drain out ofthe stack I preferably corrugate the top section 9 as I have the outsideof the stack. If desired, a rim 12 can.

be formed on the base of the drain to collect the condensate, and ifdesired, the condensate collecting in the rim l2 can be led away througha suitable drain pipe, not shown.

While I have disclosed that the drain is positioned in a vertical pipe,it will also operate satisfactorily in angularly positioned pipes. Inaddition, it can be used to provide a connection between pipes 5 and 6even though they are not on the same longitudinal axis.

In addition to acting as a condensate drain, the device of the presentinvention assists the draft through the stack provided by pipes 5 and 6,permitting air to enter and create a draft through pipe 5. The presenceof the condensate drain in the stack also tends to offset a gust of windblowing back down the stack and putting out a burner flame.

While I have so far described the device asa condensate drain only inconnection with burner gases it is not limited to this application. Forexample, it can be used to advantage in a fume vent line from aventilated hood to separate grease or other condensate from the gas andprevent it from running back toward the gas source.

Condensate is collected in the rim I2, as I have mentioned. This rim canbe turned in toward the base 8 or it can even be formed at a suitableangle to the base to permit the drain to be fastened to a roof toprovide a roof flange for supporting the drain and pipe section 5.

I claim;

1. In combination, a first pipe adapted to lead from a wet gas source. asecond pipe extending beyond said first pipe, and means connecting saidpipes and comprising a frustum of a cone, one end being of largerdiameter than the first pipe and positioned over an end of the firstpipe and extending into an end of the second pipe, the side wall of saidfrustrum being corrugated to provide a plurality of liquid passages fromsaid second pipe to the atmosphere.

2. A flue pipe construction comprising a first vertical flue pipe, asecond vertical flue pipe above the first pipe, and a connection joiningsaid pipes comprising a frustum of a cone having a corrugated side wall,one end of said Icone frustum being of a larger diameter than the firstpipe, said connection being positioned with said wall over the end ofthe first pipe and extending into the second pipe, said corrugationsbeing of such depth and extent as to provide a plurality of liquidpassages from the second pipe to the atmosphere when the connection isin that position in which it joins said pipes together.

WILLIAM QUEIROLO.

